High-voltage switch with cooling

Abstract

An exemplary encapsulated high-voltage switch is disclosed which contains a heat-generating current conductor, a metal encapsulation surrounding the current conductor, and a cooling element. A cooler of the cooling element is fixed on a part of the encapsulation that is embodied as a mounting plate, and has cooling ribs arranged outside the encapsulation. In a section of the cooler that is embodied as a cooling block, at least a portion of the cooling ribs is arranged parallel to the mounting plate and is held on a heat distributor fixed to the mounting plate in such a way that on both sides of the heat distributor in each case one of two groups of cooling channels arises, in which the cooling channels are in each case arranged in the manner of a sandwich. The cooling channels can, for example, be oriented in a manner inclined relative to a horizontal axis of the switch.

1. An encapsulated high-voltage switch, comprising:
 a heat-generating current conductor; 
 a metal encapsulation surrounding the current conductor; and 
 a cooling element with a cooler which is fixed on a part of the encapsulation that is embodied as a mounting plate, and which has cooling ribs arranged outside the encapsulation, a section of the cooler being embodied as a cooling block, at least a portion of the cooling ribs being arranged parallel to the mounting plate and being held on a heat distributor fixed to the mounting plate such that each side of the heat distributor includes one of two groups of cooling channels, wherein the cooling channels in each group of cooling channels are arranged as a sandwich, and wherein each group of cooling channels is inclined relative to a horizontal axis of the switch. 
 
     
     
       2. The switch as claimed in  claim 1 , configured as a high voltage switch, wherein the heat distributor is embodied as a plate and is fixed to the mounting plate by an edge projecting from the cooling ribs and wherein each group of cooling channels is inclined relative to a horizontal axis of the switch. 
     
     
       3. The switch as claimed in  claim 2 , comprising:
 a fixing element that is led through the mounting plate and rigidly connected to the mounting plate, and that is formed into the edge. 
 
     
     
       4. The switch as claimed in  claim 3 , wherein the heat distributor comprises:
 a cavity for condensation of vapor that transports heat from the encapsulation into the cooler. 
 
     
     
       5. The switch as claimed in  claim 4 , comprising:
 a hollow lug that is led through the mounting plate and rigidly connected to the mounting plate, and that is formed into the edge, said lug connecting the cavity to an evaporator of the cooling element, said evaporator being arranged in an interior of the encapsulation. 
 
     
     
       6. The switch as claimed in  claim 5 , wherein the heat distributor and the portion of the cooling ribs fixed to the heat distributor are produced in a shape of an extruded hollow profile. 
     
     
       7. The switch as claimed in  claim 6 , wherein the cooling block comprises:
 a section of the extruded hollow profile that is cut to length and welded in a vacuum-tight manner to closure plates at ends of the section. 
 
     
     
       8. The switch as claimed in  claim 7 , comprising:
 at least two cooling blocks embodied substantially identically, fixed to the mounting plate; and 
 a hollow collecting channel held on a side of the mounting plate which faces away from the cooling blocks, said collecting channel being connected with a vacuum-tight connection to a cavity of each of the two cooling blocks and to the evaporator. 
 
     
     
       9. The switch as claimed in  claim 8 , wherein the collecting channel comprises:
 a tube connector connected in a vacuum-tight manner to the evaporator; and 
 at least one connecting piece embodied in hollow fashion and serving for the vacuum-tight connection of an auxiliary device. 
 
     
     
       10. The switch as claimed in  claim 9 , comprising:
 a connecting channel arranged outside the encapsulation, fitted to ends of one of the cooling blocks which face away from the collecting channel, said connecting channel connecting cavities of heat distributors of the cooling ribs to one another. 
 
     
     
       11. The switch as claimed in  claim 2 , wherein the heat distributor comprises:
 a cavity for condensation of vapor that transports heat from the encapsulation into the cooler. 
 
     
     
       12. The switch as claimed in  claim 11 , wherein the heat distributor and the portion of the cooling ribs fixed to the heat distributor are produced in a shape of an extruded hollow profile. 
     
     
       13. The switch as claimed in  claim 4 , comprising:
 at least two cooling blocks embodied substantially identically, fixed to the mounting plate; and 
 a hollow collecting channel held on a side of the mounting plate which faces away from the cooling blocks, said collecting channel being connected with a vacuum-tight connection to a cavity of each of the two cooling blocks and to the evaporator. 
 
     
     
       14. The switch as claimed in  claim 13 , comprising:
 a connecting channel arranged outside the encapsulation, fitted to ends of one of the cooling blocks which face away from the collecting channel, said connecting channel connecting cavities of heat distributors of the cooling ribs to one another.